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Preface - kmutt

Preface - kmutt

KMUTT Annual Research

KMUTT Annual Research Abstracts 2005 dialogue. It uses speech recognition, vision processing, map processing, search algorithm and dialogue processing techniques. The system focuses on computing the meaning from multi modal input. As an example of proposed framework for processing meaning, we build a navigation system using the dialogue system which can understand utterance by a user and retrieve information through dialogue. IC-021 A FINGERPRINT MATCHING METHOD USING DCT FEATURES Suwat Tachaphetpiboon, Thumrongrat Amornraksa International Symposium on Communications and Information Technologies 2005 (ISCIT 2005), October 12-17, 2005, Fragrant Hill Hotel, Beijing, China, pp. 446-449 This paper proposes an extraction method of DCT features for fingerprint matching. In the features extraction process, a fingerprint image is quartered and transformed by the DCT. The standard deviation of the DCT coefficients in predefined areas is then calculated and used for fingerprint matching. The recognition rate of the proposed method is evaluated by a k-NN classifier. The results obtained are finally compared to the existing method based on the wavelet features. The processing time required in both features extraction and matching processes between two approaches are also compared. With our proposed method, both higher recognition rate and lower complexity can be achieved at the same time. IC-022 A MATCHING METHOD FOR FINGERPRINT IMAGES USING SUB-BANDS OF DWT COEFFICIENTS Suwat Tachaphetpiboon, Thumrongrat Amornraksa The 2005 Electrical Engineering/Electronics, Computer, Telecommunications, and Information Technology International Conference (ECTI-CON 2005), May 12-13, 2005, Asia Pattaya Beach Hotel, Pattaya, Cholburi, Thailand, pp. 99-102 This paper proposes a ridge feature based matching method that uses sub-bands of DWT coefficients to generate fingerprint features. By properly selecting some sub-bands 85 after a fingerprint image is segmented and transformed by the DWT, informative features can be attracted and used for fingerprint matching purpose. In the paper, we examine two possible approaches used in determining the proper sub-bands, obtained from several of DWT e.g. Daubechies and Symmlet, and evaluate the performance of our approaches by a KNN classifier. The experimental results show that a better improvement in term of recognition rate is accomplished, compared to the DWT based matching methods previously introduced in [6] and [7]. With the proposed method, more accuracy in fingerprint recognition process can be achieved. IC-023 FINGERPRINT MATCHING METHOD USING ZIGZAG-SCANNED DCT COEFFICIENTS Suwat Tachaphetpiboon, Thumrongrat Amornraksa The 20 th Commemorative International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2005), July 4-7, 2005, The Shilla Hotel, Jeju, Korea, pp. 1171-1172 This paper proposes a matching method for fingerprint images using zigzag-scanned DCT coefficients. Basically, every fingerprint image contains some oscillated patterns presenting ridge space and ridge orientation, and these informative features can be frequently used for fingerprint classification. In our proposed method, the DCT is considered and used to extract such informative features for fingerprint matching purpose. The recognition rate obtained from the proposed method is evaluated by a k-NN classifier, and then compared with the previous matching methods based on the DWT approach. The results show a significant improvement in both recognition rate and computation time required in the features extraction process. Accordingly, with our proposed method, the recognition rate is improved by 1.1% to 13.19%, while the processing time is reduced by 2.74 to 8.55 times. IC-024 ZEROTREES BASED DIGITAL WATERMARKING USING CODED SPEECH Sataporn Schwindt, Pipat Supasirisun, Thumrongrat Amornraksa The 20 th Commemorative International International Conference

86 Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 205), July 4-7, 2005, The Shilla Hotel, Jeju, Korea, pp. 691-692 This paper proposes a blind watermarking scheme based on zerotrees approaches. In the scheme, the PCM coded speech is used as a watermark signal, while the listening test is used as a watermark identification method. In this paper, we evaluate and compare the performance obtained from three different watermark algorithms based on zerotrees of the rearranged DCT, the DWT and the WPT coefficients. In the experiments, the watermarked images having equivalent quality, obtained from three different schemes, are attacked by various digital signal processing techniques e.g. JPEG compression standard, edge cropping, brightness/contrast enhancement. Then the robustness of the extracted watermark is evluated by the Normalized Correlation (NC) and the listening tests. The results show that, on average, the watermark algorithm using the rearranged DCT approach is superior to the other two. IC-025 PERCEPTUAL BASED IMAGES WATERMARKING USING SELECTIVE SUB- BANDS OF DWT COEFFICIENTS Narong Somtawin, Suwat Tachaphetpiboon, Thumrongrat Amornraksa The 20 th Commemorative International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2005), July 4-7, 2005, The Shilla Hotel, Jeju, Korea, pp. 693-694 This paper presents a perceptual based watermarking algorithm for images. In the traditional scheme, the DWT is directly applied to a host image to obtain the watermarking data, while a unique pseudo-random sequence is generated and used as a watermark signal. The Human Visual System (HVS) is also used for watermark strength tuning. To improve the scheme efficiency, the watermark is embedded into a predifined subband of the DWT coefficients. The improved results in terms of quality of the watermarked image and robustness of the embedded watermark are reported and compared to the traditional watermarking scheme. KMUTT Annual Research Abstracts 2005 IC-026 LOW COST ENCRYPTION SCHEME FOR COMPRESSED AUDIO Pichit Tananchai, Suwat Tachaphetpiboon, Thumrongrat Amornraksa The 20 th Commemorative International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2005), July 4-7, 2005, The Shilla Hotel, Jeju, Korea, pp. 59-60 A compressed audio encryption scheme based on selective encryption technique is proposed in this paper. In the scheme, some important parameters are selected and encrypted, and that encrypted parts are used to protect the entire audio bitstream. The experiments focus on the standard MP3 audio bitstream. Four parameters, namely main_data_begin, scfsi, part2_3_length and table_select, are considered for a practice use. The performance in terms of signal to Noise Ratio (SNR), listening test score, encryption percentage and processing time are compared to determine the most impartant part for selective encryption. The results show that the proposed encryption scheme achieves the optimum performance when the main_ data_ begin is implemented. IC-027 NEW APPROACH FOR AUDIO WATERMARKING USING PSYCHOACOUSTIC MODEL Sukhanitta Poomdaeng, San Ratanasanya, Pipat Supasirisun, Sataporn Schwindt, Suwat Tachaphetpiboon, Thumrongrat Amornraksa The 20 th Commemorative International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2005), July 4-7, 2005, The Shilla Hotel, Jeju, Korea, pp. 397-398 This paper describes new approach to apply psychoacoustic model to the wavelet based audio digital watermarking. In the scheme, the additive watermarking technique is used to embed a unique pseudo-random sequence, considered as a watermark, into the transformed domain of audio signal. The watermark strength is properly adjusted based on weighting factor derived from the proposed psychoacoustic model. The results show that at the equivalent quality of the watermarked audio, judged by the human hearing system, the International Conference

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    CONTENTS Page Preface International

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    National Conferences

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    210 จอมเทียนปา

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    212 การสกัดสาร

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    214 ไดแก อุณหภู

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    216 โดยกลไกของ

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    218 เคลือบเมื่

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    220 สําเริง จัก

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    222 ลดเวลาตลอด

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    224 อุณหภูมิสู

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    226 NC-043 การวิเคร

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    228 เกิดพฤติกร

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    230 เดียว เพื่อ

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    232 มากนอยเพีย

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    234 หลักที่พบใ

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    236 NC-073 การออกแบ

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    238 บทความนี้น

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    240 นําเอาเวคเ

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    242 งานวิจัยนี

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    244 การอบแหงลด

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    246 แยกเฟสต่ํา

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    248 กลบ โดยเปรี

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    250 นํามาใช คือ

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    252 วิเคราะหหา

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    254 NC-123 การวิเคร

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    256 NC-129 เครื่องผ

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    258 สามารถขยาย

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    260 ครั้งที่ 43, 1-

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    262 calculated with the use of the

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    264 Version 1.3.1 และ Softwar

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    266 ขนไกได จากก

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    268 โครงสรางขอ

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    270 การปลูกพืช

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    272 ระดับพึงพอ

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    274 ของแกสโซฮอ

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    276 1) สภาพทั่วไ

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    278 อนุปริญญา แ

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    280 อาชีวศึกษา

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    282 กระทบตอคุณ

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    284 ตั้งกลไกแข

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    286 นุชจรินทร เ

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    288 โดยรวมผูบร

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    290 แนนกระแสไฟ

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    292 NC-222 ผลงานตีพ

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    294 NC-227 เตาเผาไห

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    296 จําเพาะรวม

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    298 NC-238 จลนพลศาส

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    300 ทนงเกียรติ

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    302 ดีเซลนั้นม

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    304 NC-254 การใชเทค

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    306 อาคารศูนยก

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    308 กระบวนการร

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    310 บรรยากาศขอ

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    312 metal ions on 2-AP biosyntheis

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    314 total clones while the ethanol

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    316 การประชุมท

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    318 BioThailand (The 16 th Annual M

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    320 สูงที่สุดพ

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    322 นัยสําคัญท

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    324 ความเขมขนร

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    326 ปลูกแบบพรา

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    328 นี้ทําใหทร

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    330 ดุลชาติ มาน

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    332 ไมโครเมตร ส

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    334 In this study, we collected seq

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    336 กนกรัตน นาค

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    338 การพัฒนาสื

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    340 one of the causes of difficulty

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    342 ทวีรัตน วิจ

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    344 program, Cytoscape. This model

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    346 production demand. Nevertheless

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    348 อุลตราไวโอ

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    350 นี้อยูในชว

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    352 เพื่อนําสว

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    354 trichloroacetic acid (TCA) ม

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    356 ทรัพยากรที

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    358 ในประเทศสห

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    360 8-9 ธันวาคม 2548,

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    362 ซึ่งเกิดขอ

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    364 NC-391 การวิเคร

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    366 การประชุมว

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    368 2547) พบวามหาว

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    370 กนกพร ลีลาเ

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    Authors Index

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    376 จงจิตร หิรั

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    378 ธ ธนธร ทองส

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    380 พยุงศักดิ์

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    382 วรรณพ วิเศษ

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    384 สุดารัตน จิ

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    386 อุลาวัณย กุ

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    388 138, 141, 142 Jarunya Narangaja

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    390 Panida Kongsawadworakul 191 Pan

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    392 Sorakrich Maneewan 124, 136 Sor

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    394 KMUTT Annual Research Abstracts

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